On the Stability of Long Series Tidal Analyses

Authors

  • A. S. Franco Institute Oceanográfico of the São Paulo University, Brazil
  • J. Harari Institute Oceanografico of the Sao Paulo University, Brazil

Abstract

Fourteen analyses with a nodal cycle resolution of filtered daily values of the 'mean' sea level at Cananéia (Brazil) were worked out, with a one-year shift. The results were examined for the stability of the harmonic constants of constituents Sa, Ssa, Mm, MSf, Mf and Mtm. Simultaneous barometric pressure data were available to correct the filtered tidal heights and the analyses were worked out with and without these corrections.The general conclusion is that the harmonic constants of Sa and Ssa were not stable and that their phase lags increased in the successive analyses. The harmonic constants of the remaining long period constituents were absolutely unstable and completely unreliable. Other fourteen harmonic analyses of 10*214 hourly tidal heights were worked out, for determining the harmonic constants of constituents with higher frequencies, in the same port. The results of these analyses, with a one-year shift,were very stable and gave an excellent insight of the micro-structure of the phenomenon.

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Published

2015-05-19

How to Cite

Franco, A. S., & Harari, J. (2015). On the Stability of Long Series Tidal Analyses. The International Hydrographic Review, 70(1). Retrieved from https://journals.lib.unb.ca/index.php/ihr/article/view/23243

Issue

1993: Vol. LXX, No. 1

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Articles

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